One spectator was arrested and 13 were ejected from a preseason football match on Wednesday between new A-League side Western Sydney Wanderers and Sydney United, who plays in the New South Wales Premier League.

Police said on Thursday that the incident, the second involving fan violence in 10 days in western Sydney, began when a firecracker was thrown into the crowd at Edensor Park. Police were forced to use pepper spray after a group of about 60 spectators reacted to the arrest of the man who threw it.

A 27-year-old man was charged with assaulting police and resisting arrest and will appear in court in September.

"The troublemakers who bring the game into disrepute with their reckless behaviour have no place in the game"

FFA chief Ben Buckley

Sydney United beat the A-League side 2-1.

In another preseason game August 14 between A-League club Sydney FC and NSW League side Macarthur Rams, a man was knocked out and a 6-year-old boy was hit in the head by a rock during a disturbance at Campbelltown Stadium aftera flare was thrown into the crowd.

Later on Thursday, Football Federation Australia said both men involved in the incidents would be banned from attending A-League or Australian internationals for five years.

"The troublemakers who bring the game into disrepute with their reckless behaviour have no place in the game,'' said FFA chief Ben Buckley.

"The incidents at Campbelltown and Edensor Park over the past week were the work of a few idiots who wanted to cause trouble.''

A third man was to be banned after the incidents at Edensor Park, the FFA said, with New South Wales Police indicating further investigations would take place.